CN103831950A - Method of molding boot for constant velocity joint - Google Patents
Method of molding boot for constant velocity joint Download PDFInfo
- Publication number
- CN103831950A CN103831950A CN201310587448.3A CN201310587448A CN103831950A CN 103831950 A CN103831950 A CN 103831950A CN 201310587448 A CN201310587448 A CN 201310587448A CN 103831950 A CN103831950 A CN 103831950A
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- China
- Prior art keywords
- mould
- mandrel
- cutting apart
- locating ring
- constant velocity
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
- B29C45/33—Moulds having transversely, e.g. radially, movable mould parts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/40—Removing or ejecting moulded articles
- B29C45/44—Removing or ejecting moulded articles for undercut articles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/40—Removing or ejecting moulded articles
- B29C45/44—Removing or ejecting moulded articles for undercut articles
- B29C45/4407—Removing or ejecting moulded articles for undercut articles by flexible movement of undercut portions of the articles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/40—Removing or ejecting moulded articles
- B29C45/44—Removing or ejecting moulded articles for undercut articles
- B29C45/4421—Removing or ejecting moulded articles for undercut articles using expansible or collapsible cores
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
- F16D3/84—Shrouds, e.g. casings, covers; Sealing means specially adapted therefor
- F16D3/843—Shrouds, e.g. casings, covers; Sealing means specially adapted therefor enclosed covers
- F16D3/845—Shrouds, e.g. casings, covers; Sealing means specially adapted therefor enclosed covers allowing relative movement of joint parts due to the flexing of the cover
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/703—Bellows
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- General Engineering & Computer Science (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
A method of molding a boot for a constant velocity joint includes: molding a compact by injection molding with use of an inner die and an outer die; raising split dies of the inner die so as to separate the split dies from a set ring; further raising a core shaft of the inner die so as to separate the core shaft from the split dies; separating the split die from the compact; introducing the lower end portion of the separated split die into the set ring along the engaging surface; and inserting a lower end portion of the core shaft through the set ring from above the set ring, and pressing upper end portions of the respective split dies downward by a protruding portion of the upper end portion of the core shaft so that the lower end portions of the respective split dies are engaged with the engaging surface closely.
Description
The application advocates the priority of No. 2012-257638th, the Japanese patent application proposing on November 26th, 2012, and quotes the full content including description, accompanying drawing, summary at this.
Technical field
The present invention relates to constant velocity universal and save the forming method of guard shield.
Background technology
For example,, in the vehicles such as automobile, for the driving wheel moving up and down to rising and falling along with road surface transmits revolving force and uses constant velocity cardan joint.In this constant velocity cardan joint, for fear of outside muddy water, dust and constant velocity cardan joint is protected, and the constant velocity universal that synthetic resin manufacture is installed for the lubricating grease of the lubricated use that is injected into constant velocity cardan joint is kept is saved guard shield.Constant velocity universal is saved guard shield and is made up of large-diameter portion cylindraceous, minor diameter part and the wrinkle portion by above-mentioned large-diameter portion and minor diameter part link, thereby conventionally carrys out moulding by blow molding method.
In above-mentioned blow molding method, by being placed in external mold being formed as bag-shaped molten resin, do not use internal mold, carry out moulding and make above-mentioned bag-shaped molten resin expand and be pushed on external mold by air blast.Therefore, blow molding method accurately moulding constant velocity universal is saved the inner peripheral surface of guard shield, and the constant velocity universal that therefore can not be called the accurate wrinkle structure of best needs is saved the forming method of guard shield.So, as shown in TOHKEMY 2012-126033 communique, propose to have the method that uses external mold and internal mold (core mold) to carry out injection moulding constant velocity universal to save guard shield.
The internal mold using in the injection mo(u)lding of TOHKEMY 2012-126033 communique comprise be formed as being accompanied by from upper end towards lower end and gradually the core of hole enlargement and the configuration of multiple periphery along this core cut apart mould.In order to save the moulding of guard shield at constant velocity universal while finishing, take out constant velocity universal and save the formed body of guard shield from external mold, and after making core and respectively cutting apart mould to separate, again assemble this internal mold.
But, in the internal mold of recording at TOHKEMY 2012-126033 communique, to core when cutting apart mould and assemble, need to make respectively to cut apart the operation (state from Fig. 3 of TOHKEMY 2012-126033 communique become the operation of the state of Fig. 1) of mould towards radial outside expansion by boosting core.Therefore, there are the following problems, in the time boosting core, easily producing each other gap along the mould of cutting apart of circumferential adjacency, if carry out injection mo(u)lding under the state that has produced this gap, produces burr at formed body that is:.
Summary of the invention
One of object of the present invention is to provide and can prevents that the formed body after injection mo(u)lding from producing the constant velocity universal of burr and save the forming method of guard shield.
The forming method that the constant velocity universal of a mode of the present invention is saved guard shield is characterised in that, comprise in order following operation: with internal mold and and described internal mold between form die cavity the external mold operation carrying out injection mo(u)lding constant velocity universal and save the formed body of guard shield, wherein, inner mold is standby: mandrel, and it has circular outer peripheral face and is configured to axis and extends along the vertical direction; Locating ring cylindraceous, it is inserted for described mandrel, and be formed with downward the taper surface of undergauge gradually in the inner circumferential side of upper end be the snap-latch surface of ring-type; And multiple moulds of cutting apart, described multiple mould outer peripheral faces along described mandrel centered by the axis of described mandrel of cutting apart configure radially, thereby and bottom is imported and is sticked in described snap-latch surface and mutually connect airtight; Under the state that described internal mold is separated with described external mold, multiplely cut apart that mould is together mentioned with described mandrel and described formed body and the operation that separates from described locating ring by described; Described mandrel is further mentioned and from described multiple cut apart mould separate operations; Make described respectively cut apart under the state that mould staggers towards described central side by described respectively cut apart mould towards below pull, thereby make the described operation that mould separates from described formed body of respectively cutting apart; The mould of respectively cutting apart having separated described in making moves towards below, thereby makes the described bottom of respectively cutting apart mould import the operation of described locating ring along described snap-latch surface; And the bottom of described mandrel is inserted through to described locating ring from the top of described locating ring, and the protuberance of periphery of upper end by being based in described mandrel pushes the described upper end of respectively cutting apart mould towards below, thereby the described bottom of respectively cutting apart mould is engaged with described snap-latch surface, and make respectively to cut apart the operation that mould connects airtight mutually.
Brief description of the drawings
Fig. 1 represents that the related constant velocity universal of one embodiment of the present invention saves the cutaway view of the mould that the forming method of guard shield uses.
Fig. 2 is the concise and to the point top view that represents the internal mold of above-mentioned mould.
Fig. 3 is the cutaway view that represents to unload from the counterdie of above-mentioned mould the state of core insert.
Fig. 4 represents above-mentioned internal mold to decompose and the cutaway view of the decomposition kludge assembled.
Fig. 5 is the cutaway view that represents the duty of the support unit of above-mentioned decomposition kludge.
Fig. 6 is the top view of above-mentioned support unit.
Fig. 7 is the cutaway view that represents the duty of the first fixture of above-mentioned decomposition kludge.
Fig. 8 is the cutaway view that represents the backing-out punch of above-mentioned decomposition kludge and the duty of the second fixture.
Fig. 9 is the cutaway view of the decomposition kludge midway of operation that represents above-mentioned forming method.
Figure 10 is the cutaway view of the decomposition kludge midway of operation that represents above-mentioned forming method.
Figure 11 is the cutaway view of the decomposition kludge midway of operation that represents above-mentioned forming method.
Figure 12 is the top view that represents the elaborative sequence of cutting apart mould of above-mentioned decomposition kludge.
Detailed description of the invention
Can understand above-mentioned and more feature and advantage of the present invention according to the detailed description of embodiment being carried out referring to accompanying drawing, in the accompanying drawings, identical parts be marked to identical Reference numeral.
Next, preferred embodiment describe of the present invention with reference to accompanying drawing.
Fig. 1 represents that the related constant velocity universal of one embodiment of the present invention saves the cutaway view of the mould that the forming method of guard shield uses.In Fig. 1, mould 1 is the mould that injection mo(u)lding constant velocity universal is saved guard shield 9.Mould 1 comprises pair of right and left external mold 11, internal mold 12 and counterdie 13.Above-mentioned internal mold 12 is disposed at the inner side of external mold 11.Above-mentioned counterdie 13 is disposed at the downside of external mold 11.Constant velocity universal is saved guard shield 9 and is comprised and be formed as large-diameter portion 9a cylindraceous, minor diameter part 9c and the 9b of wrinkle portion.The above-mentioned wrinkle 9b of portion links above-mentioned large-diameter portion 9a and minor diameter part 9c.
The upper surface of counterdie 13 be formed with towards above outstanding stage portion 13a, in this stage portion, 13a is formed with installing hole 13b.Be formed with in the side of stage portion 13a with constant velocity universal and save die face 13c corresponding to the shape of inner peripheral surface of the large-diameter portion 9a in guard shield 9.Between this die face 13c and the die face 11a of external mold 11, be formed with die cavity 19c.Internal mold 12 comprises that mandrel 14, multiple mould 15a～15h(of cutting apart are with reference to Fig. 2) and locating ring 16.Above-mentioned mandrel 14 is configured to axis X and extends along the vertical direction.The above-mentioned radial outside of cutting apart mould 15a～15h and be disposed at this mandrel 14.Above-mentioned locating ring 16 is disposed at the above-mentioned below of cutting apart mould 15a～15h.
Mandrel 14 is made up of solid cylindrical member, and has circular outer peripheral face 14a.Form the protuberance 14b(dipper crowding gear of the ring-type outstanding towards radial outside in the periphery of the upper end of mandrel 14).The lower surface of this protuberance 14b and the upper surface butt of respectively cutting apart mould 15a～15h, thus the upper end of respectively cutting apart mould 15a～15h is pushed to (also with reference to Fig. 2) towards below.
Be formed with constant velocity universal and save die face 14c corresponding to the shape of inner peripheral surface of the minor diameter part 9c in guard shield 9 at the outer peripheral face of protuberance 14b.Between this die face 14c and the die face 11a of external mold 11, be formed with die cavity 19a.Form the fastener 14d of multiple concavities in the periphery of the bottom of mandrel 14.Above-mentioned fastener 14d engagement have by the bottom of mandrel 14 towards below the pulling mechanism 10 that pulls.Pulling mechanism 10 has can be respectively and multiple hook portion 10a of above-mentioned each fastener 14d engagement.
Fig. 2 is the concise and to the point top view that represents internal mold 12.In Fig. 1 and Fig. 2, internal mold 12 possesses first and cuts apart mould 15a～four and cut apart mould 15d, the 5th and cut apart mould 15e～eight and cut apart mould 15h as above-mentioned multiple mould 15a～15h of cutting apart.The above-mentioned mould 15a～15d of cutting apart is formed as overlooking rectangular-shaped.The above-mentioned mould 15e～15h of cutting apart is formed as overlooking fan shape.Above-mentioned mould 15a～15h outer peripheral face 14a along mandrel 14 centered by the axis X of mandrel 14 of cutting apart is configured to radial.Now, overlook as rectangular-shaped cutting apart mould 15a～15d and overlook as the mould 15e～15h of cutting apart of fan shape is circumferentially alternatively configuring, thereby entirety is formed as overlooking circle.
In Fig. 1 and Fig. 2, inner peripheral surface 151a～151h of respectively cutting apart mould 15a～15h is formed as circular-arc along the outer peripheral face 14a of mandrel 14.Be formed with constant velocity universal and save die face 152a～152h corresponding to the shape of each inner peripheral surface of large-diameter portion 9a in guard shield 9 and the 9b of wrinkle portion at the outer peripheral face of respectively cutting apart mould 15a～15h.The lower surface of respectively cutting apart mould 15a～15h is positioned on the stage portion 13a of counterdie 13.
Be formed with first recess 153a～153h at the lower surface of respectively cutting apart mould 15a～15h, section is dimetric second recess 154a～154h.Above-mentioned first recess 153a～153h is inserted in the upper end of locating ring 16.The first support unit 23a～eight support unit 23h described later is inserted respectively to above-mentioned second recess 154a～154h.First recess 153a～153h is being configured to overlook entirety under circular state and is being formed as ring-type cutting apart mould 15a～15h as shown in Figure 2.Under this state, be formed with the engaged face 15i of ring-type at the medial surface of first recess 153a～153h, the engaged face 15i of above-mentioned ring-type becomes from upper end downward the taper surface of undergauge gradually.The lateral surface of first recess 153a～153h is formed as inserting under the state of first recess 153a～153h opposed with the outer peripheral face of locating ring 16 in the upper end of locating ring 16.
In Fig. 1, locating ring 16 entirety are formed as cylindric, and are installed in the mode that can load and unload in the installing hole 13b of counterdie 13.The bottom of mandrel 14 is inserted through the inner peripheral surface 16a of locating ring 16 in the mode that can move up and down.In addition, be formed with the snap-latch surface 16b of ring-type in the inner circumferential side of the upper end of locating ring 16, the snap-latch surface 16b of above-mentioned ring-type for importing the bottom of respectively cutting apart mould 15a～15h engage with the bottom of respectively cutting apart mould 15a～15h under the state that above-mentioned upper end is inserted in to above-mentioned first recess 153a～153h.This snap-latch surface 16b is formed as larger than the diameter of inner peripheral surface 16a, and by from upper end downward gradually the taper surface of undergauge form.
Periphery in the upper end of locating ring 16 is formed with endless groove 16c.Be provided with and the O type circle 17 of lateral surface (opposed faces) crimping of first recess 153a～153h of respectively cutting apart mould 15a～15h at this endless groove 16c.Be formed with multiple the first slot 16d in the periphery of locating ring 16, above-mentioned multiple the first slot 16d are positioned at the below of above-mentioned endless groove 16c, and supply respectively multiple claw 3a(of chuck 3 with reference to Fig. 3) engaging.In addition, be formed with multiple the second slot 16e in the periphery of the bottom of locating ring 16, above-mentioned multiple the second slot 16e are for the engagement pawl 22c engaging of holding member 22 described later.
Fig. 3 is illustrated in the cutaway view that unloads the state of core insert 12 after injection mo(u)lding from counterdie 13.In Fig. 3, dispose multiple (for example, as four) at counterdie 13 in the mode that can move up and down and be formed as bar-shaped backing-out punch 18, above-mentioned multiple backing-out punch 18 are for pushing the lower surface that is installed on the locating ring 16 in installing hole 13b.Thus, after a pair of external mold 11 that makes the state in Fig. 1 moves towards the left and right sides in the mode away from internal mold 12, as shown in Figure 3, thereby by being moved towards top, each backing-out punch 18 can push the lower surface of locating ring 16.If as above locating ring 16 is pushed, mandrel 14, cut apart mould 15a～15h and constant velocity universal and save formed body W and the locating ring 16 of guard shield 9 and together move towards top, can make internal mold 12 separate towards the top of counterdie 13.And, from this state, so that the mode that multiple claw 3a of chuck 3 and each slot 16d of locating ring 16 engage is mentioned multiple claw 3a of chuck 3, thereby can make internal mold 12 and formed body W move towards decomposition kludge 2 described later.
Fig. 4 represents internal mold 12 to decompose and the cutaway view of the decomposition kludge 2 assembled.In Fig. 4, this decomposition kludge 2 is by above-mentioned chuck 3, the internal mold 12 moving from mould 1 to be decomposed and takes out formed body W, and the device of again decomposed internal mold 12 being assembled.Decomposing kludge 2 possesses: base station 21, a pair of holding member 22, the first support unit 23a～eight support unit 23h(are with reference to Fig. 6), a pair of the first fixture 24(is with reference to Fig. 7), backing-out punch 25(is with reference to Fig. 8) and a pair of the second fixture 26(with reference to Fig. 8).
In Fig. 4, base station 21 has cylindrical portion 21a, and the state with the bottom that is inserted with mandrel 14 under the state that above-mentioned cylindrical portion 21a extends along the vertical direction in the axis X of mandrel 14 supports mandrel 14.In the time that the bottom of mandrel 14 is inserted in cylindrical portion 21a, the lower surface butt of the upper surface of cylindrical portion 21a and locating ring 16, thus mandrel 14 is limited towards the movement of below.Be formed with in the bottom of cylindrical portion 21a for the through hole 21b from inserting below base station 21 for backing-out punch 25.
A pair of holding member 22 is the parts that under the state on the cylindrical portion 21a that locating ring 16 is disposed to base station 21, locating ring 16 kept, and with can along continuous straight runs (left and right directions of Fig. 4) mobile mode be disposed at the top of base station 21.The leading section of each holding member 22 is formed as section L word shape by horizontal part 22a and vertical component effect 22b, is formed with the engagement pawl 22c engaging with the second slot 16e of locating ring 16 in the upper end of above-mentioned vertical component effect 22b.In addition, decompose kludge 2 and also possess shut-off mechanism (omit diagram), above-mentioned shut-off mechanism under the state of Fig. 4, the grid lines part of the 4(Fig. 4 of running channel portion to the importing road 11b moulding at external mold 11) cut off.
Fig. 5 is the cutaway view that represents the duty of the first support unit 23a～eight support unit 23h that decomposes kludge 2.In Fig. 4 and Fig. 5, the first support unit 23a～eight support unit 23h is the parts that support respectively cutting apart mould 15a～15h the state that mould 15a～15h separates from locating ring 16 making respectively to cut apart.Each support unit 23a～23h is disposed at the horizontal part 22a of holding member 22 and respectively cuts apart between mould 15a～15h, and can be independently along the vertical direction and horizontal direction move.There is the bar-shaped holding section 231a～231h extending along the vertical direction at the leading section of each support unit 23a～23h.Each holding section 231a～231h can engage with second recess 154a～154h of respectively cutting apart mould 15a～15h respectively.
Fig. 6 is the top view of the first support unit 23a～eight support unit 23h.As shown in Figure 6, the first support unit 23a～eight support unit 23h is configured to radial centered by axis X.Holding section 231a～231h of each support unit 23a～23h is formed as section quadrangle shape in the mode coordinating with the section shape of second recess 154a～154h of respectively cutting apart mould 15a～15h.Thus, can limit the mould 15a～15h along continuous straight runs centered by support unit 23a～23h of cutting apart that is supported parts 23a～23h supporting is rotated.
Fig. 7 is the cutaway view that represents the duty of the first fixture 24 that decomposes kludge 2.In Fig. 7, if become by support unit 23a～23h and mentioned the state of respectively cutting apart mould 15a～15h, a pair of the first fixture 24 keeps formed body W, and, above-mentioned a pair of the first fixture 24 be configured to can along continuous straight runs (left and right directions of figure) and above-below direction move.Be formed with the maintenance face 24a corresponding with the shape of each outer peripheral face of large-diameter portion 9a, the 9b of wrinkle portion in formed body W and minor diameter part 9c at the medial surface of each the first fixture 24.Can keep the outer peripheral face of formed body W with the state of the outer peripheral face of clamping formed body W from the left and right sides by this maintenance face 24a.
Fig. 8 is the cutaway view that represents to decompose the backing-out punch 25 of kludge 2 and the duty of the second fixture 26.In Fig. 8, backing-out punch 25 is parts that the lower surface of the mandrel 14 of the cylindrical portion 21a to being inserted in base station 21 pushes, and is made up of the bar-like member that can be inserted through from the below of the through hole 21b of base station 21 the through hole 21b of base station 21.A pair of the second fixture 26 is the parts that on one side keep one side that the upper end of mandrel 14 is pulled towards top to being ejected the upper end of the mandrel 14 that device 25 pushes, and is disposed at the top of the first fixture 24 in the mode that can move up and down.Be formed with the holding section 26a engaging with the bight, upper end of the protuberance 14b of mandrel 14 at the leading section of each the second fixture 26.Can keep the upper end of mandrel 14 with the state of the upper end of clamping mandrel 14 from the left and right sides by this holding section 26a.
Next, the forming method that has used the constant velocity universal of above-mentioned mould 1 and decomposition kludge 2 to save guard shield 9 is described.First, as shown in Figure 1, in mould 1, under the state of fastener 14d engagement that makes the hook portion 10a of pulling mechanism 10 and the bottom of mandrel 14, with the state that the bottom of mandrel 14 is pulled towards below, the bottom of mandrel 14 is kept.Now, the protuberance 14b of the upper end of mandrel 14 pushes the mould 15a～15h of respectively cutting apart of internal mold 12 towards below, and the bottom of therefore cutting apart mould 15a～15h is that snap-latch surface 16b engages towards axis X side shifting and with snap-latch surface 16b along the taper surface of locating ring 16.Thus, can be so that keep cutting apart mould 15a～15h along the state that mould 15a～15h connects airtight each other of cutting apart of circumferential adjacency.
Next, carry out injection mo(u)lding constant velocity universal and save the formed body W of guard shield 9 with a pair of external mold 11 in mould 1, internal mold 12 and counterdie 13.Particularly, moulding material is directed in to each die cavity 19a～19c from the importing road 11b of external mold 11 successively, thereby carrys out injection mo(u)lding formed body W.Now, in importing road 11b, the 4(of running channel portion is with reference to Fig. 3) also one-body molded with formed body W.After injection mo(u)lding formed body W, unload above-mentioned instrument from the fastener 14d of mandrel 14, thereby remove mandrel 14 pulling towards below.
Next,, from the state of Fig. 1, a pair of external mold 11 is moved towards the left and right sides in the mode separating from internal mold 12, internal mold 12 is separated from counterdie 13.Particularly, as shown in Figure 3, by backing-out punch 18, the lower surface of locating ring 16 is pushed, make locating ring 16 and mandrel 14, cut apart mould 15a～15h and formed body W together moves towards the top of counterdie 13.From this state, each claw 3a of chuck 3 and each slot 16d of locating ring 16 are engaged and mention locating ring 16.Thus, can make internal mold 12 separate from counterdie 13.
Next, utilize chuck 3 that internal mold 12 and formed body W are together moved towards decomposing kludge 2, thereby as shown in Figure 4, the bottom of the mandrel of internal mold 12 14 is inserted in the cylindrical portion 21a of base station 21, and a pair of holding member 22 is engaged with the second slot 16e of locating ring 16.Thus, locating ring 16 is maintained on base station 21.And, under this state, to cutting off with the integrated running channel of formed body W portion 4.
Next, from the state shown in Fig. 4, the first support unit 23a～eight support unit 23h is moved towards top, and each holding section 231a～231h of the first support unit 23a～eight support unit 23h is engaged with second recess 154a～154h of respectively cutting apart mould 15a～15h.From this state, the first support unit 23a～eight support unit 23h is further moved towards top, mention and respectively cut apart mould 15a～15h.Now, though want to mention internal mold 12 entirety, remain on base station 21 because locating ring 16 is kept parts 22, therefore as shown in Figure 5, respectively cut apart mould 15a～15h and mandrel 14 moves towards top with respect to locating ring 16.Thus, can make respectively to cut apart mould 15a～15h together separates from locating ring 16 with formed body W.
Next, as shown in Figure 7, a pair of the first fixture 24 is moved respectively towards the direction of arrow in figure, with the state of clamping formed body W from the left and right sides, formed body W is kept.Then, as shown in Figure 8, backing-out punch 25 is inserted through to the through hole 21b of base station 21 from the below of the through hole 21b of base station 21, the lower surface of mandrel 14 is pushed.Now, locating ring 16 is kept parts 22 and keeps, and respectively cuts apart mould 15a～15h and moved up and down by the first fixture 24 restriction via formed body W, and therefore only mandrel 14 moves towards top.Thus, the upper end that becomes mandrel 14 is towards the outstanding state in the top of the first fixture 24.
And, from this state, the upper end of mandrel 14 is kept with the state of the upper end of clamping mandrel 14 from the left and right sides by a pair of the second fixture 26, and the second fixture 26 is moved towards top.Thus, as shown in Fig. 9 (a), can make mandrel 14 from locating ring 16 and respectively cut apart mould 15a～15h to separate.In addition, make the second fixture 26 towards above while moving, the first fixture 24 also keeps and moves towards top formed body W.
Fig. 9～Figure 11 is the cutaway view of the decomposition kludge 2 midway of operation that represents above-mentioned forming method.As shown in Fig. 9 (a), making mandrel 14, locating ring 16 and respectively cutting apart mould 15a～15h after above-below direction separates, make respectively to cut apart mould 15a～15h and separate from formed body W.Particularly, as shown in Fig. 9 (b), make respectively to cut apart mould 15a～15h towards its central side, in other words axis X side offset by each support unit 23a～23h.Now, make respectively to cut apart mould 15a～15h and move to the position that die face 152a～152h of respectively cutting apart mould 15a～15h does not disturb with the 9b of wrinkle portion of formed body W.And, as shown in Figure 10 (a), each support unit 23a～23h is moved towards below, pull towards below and separate from formed body W thereby will respectively cut apart mould 15a～15h.
Figure 12 is the top view that represents the detailed elaborative sequence of respectively cutting apart mould 15a～15h.First, as shown in Figure 12 (a), make to be formed as to overlook circular multiple cut apart in mould 15a～15h, overlook and cut apart mould 15a～four and cut apart mould 15d and separate from formed body W for rectangular-shaped first.Particularly, first, make first to cut apart mould 15a towards the offset of axis X side, and become the state shown in (b) of Figure 12.From this state, cut apart mould 15a by first and pull towards below and separate from formed body W.By method same as described above, cut apart mould 15c, second by the 3rd and cut apart mould 15b and the 4th order of cutting apart mould 15d and make the 3rd to cut apart mould 15c, second and cut apart mould 15b and the 4th and cut apart mould 15d and separate from formed body W, thereby become the state of Figure 12 (c).
Next overlooking of, making to be left cut apart mould 15e～eight for the 5th of fan shape and cut apart mould 15h and separate from formed body W.Particularly, first, make the 5th to cut apart mould 15e towards the offset of axis X side, and become the state shown in (d) of Figure 12.From this state, cut apart mould 15e by the 5th and pull towards below and separate from formed body W.By method same as described above, cut apart mould 15g, the 6th by the 7th and cut apart mould 15f and the 8th order of cutting apart mould 15h and make the 7th to cut apart mould 15g, the 6th and cut apart mould 15f and the 8th and cut apart mould 15h and separate from formed body W.
As shown in Figure 10 (a), separate from formed body W respectively cut apart mould 15a～15h by each support unit 23a～23h towards moving horizontally with the opposite direction direction of above-mentioned offset towards below move.Thus, as shown in Figure 10 (b), the engaged face 15i of respectively cutting apart the bottom of mould 15a～15h is imported into the inner circumferential side of the upper end of locating ring 16 on one side on one side along the snap-latch surface 16b of locating ring 16.In addition, respectively cut apart mould 15a～15h and be imported into after locating ring 16, also by each support unit 23a～23h supporting until mandrel described later 14 towards the mobile end of below.
All import locating ring 16 if will respectively cut apart mould 15a～15h, become the state shown in (a) of Figure 11 from Figure 10 (b), as above after the first fixture 24 that makes to be held in body W moves horizontally, remove the maintenance of the first fixture 24 and unload formed body W from decomposing kludge 2.Next the mandrel 14 that, makes to be held in the second fixture 26 moves towards below.So as shown in Figure 11 (b), the bottom of mandrel 14 is inserted into from top by the order that is formed as the inner peripheral surface of overlooking the circular central part of respectively cutting apart mould 15a～15h, the inner peripheral surface of locating ring 16 and the cylindrical portion 21a of base station 21.
If as above insert mandrel 14, the lower surface of the protuberance 14b of mandrel 14 and the upper surface butt of respectively cutting apart mould 15a～15h, thus the above-mentioned mould 15a～15h of cutting apart is pushed towards below simultaneously.Thus, the taper surface that the bottom of cutting apart mould 15a～15h is imported into locating ring 16 is snap-latch surface 16b and engaging with the snap-latch surface 16b of locating ring 16.Now, cut apart mould 15a～15h and be accompanied by and move towards below and engage with snap-latch surface 16b on one side towards axis X side shifting on one side, therefore can make the mould 15a～15h of cutting apart of circumferential adjacency connect airtight each other.Thus, respectively cutting apart mould 15a～15h becomes the state of overlooking as circular as a whole, and internal mold 12 is reduced into original state.
If the assembling of internal mold 12 finishes, make each support unit 23a～23h move towards below, thereby remove respectively cutting apart the supporting (with reference to Figure 11 (b)) of mould 15a～15h, and remove the maintenance of holding member 22 to locating ring 16.Then, make the claw 3a of chuck 3 again engage and mention internal mold 12 entirety with the first slot 16d of locating ring 16, as shown in Fig. 3 (removing the state of the formed body W in figure), make internal mold 12 be back into the assigned position of mould 1.And, from returning to the state of this assigned position, remove the engaging of chuck 3, and backing-out punch 18 is moved towards below, thereby as shown in Figure 1, internal mold 12 is arranged in the installing hole 13b of counterdie 13.
Above, save the forming method of guard shield 9 according to the constant velocity universal of present embodiment, the snap-latch surface 16b that is formed at locating ring 16 becomes downward the taper surface of undergauge gradually.Therefore, the protuberance 14b by mandrel 14 will respectively cut apart mould 15a～15h towards below while pushing, the bottom of respectively cutting apart mould 15a～15h engages with snap-latch surface 16b towards axis X side shifting on one side on one side along snap-latch surface 16b.Thus, can make to connect airtight each other along the mould 15a～15h of cutting apart of circumferential adjacency, therefore can prevent that the formed body W after injection mo(u)lding from producing burr.
In addition, in the operation of injection mo(u)lding formed body W, the protuberance 14b of mandrel 14 is kept to be pushed on multiple states of cutting apart mould 15a～15h, therefore can be so that keep cutting apart mould 15a～15h along the state that mould 15a～15h connects airtight each other of cutting apart of circumferential adjacency.Thus, can effectively prevent that the formed body W after injection mo(u)lding from producing burr.
In addition, the present invention is not limited to above-mentioned embodiment and can implements by suitably changing.For example, the mandrel 14 in above-mentioned embodiment is formed by solid cylindrical member.But, also can be formed by the cylinder part of hollow.In addition, the dipper crowding gear in above-mentioned embodiment is made up of the protuberance 14b that is based in mandrel 14.But, also can be set to and mandrel 14 splits.
Constant velocity universal according to the present invention is saved the forming method of guard shield, can prevent that the formed body after injection moulding from producing burr.
Claims (2)
1. constant velocity universal is saved a forming method for guard shield, it is characterized in that, comprises in order following operation:
With internal mold and and described internal mold between form die cavity the external mold operation carrying out injection mo(u)lding constant velocity universal and save the formed body of guard shield, wherein,
Inner mold is standby: mandrel, and it has circular outer peripheral face and is configured to axis and extends along the vertical direction; Locating ring cylindraceous, it is inserted for described mandrel, and be formed with downward the taper surface of undergauge gradually in the inner circumferential side of upper end be the snap-latch surface of ring-type; And multiple moulds of cutting apart, described multiple mould outer peripheral faces along described mandrel centered by the axis of described mandrel of cutting apart configure radially, thereby and bottom is imported and is sticked in described snap-latch surface described multiple mould of cutting apart is connected airtight mutually;
Under the state that described internal mold is separated with described external mold, multiplely cut apart that mould is together mentioned with described mandrel and described formed body and the operation that separates from described locating ring by described;
Described mandrel is further mentioned and from described multiple cut apart mould separate operations;
Make described respectively cut apart under the state that mould staggers towards described central side by described respectively cut apart mould towards below pull, thereby make the described operation that mould separates from described formed body of respectively cutting apart;
The mould of respectively cutting apart having separated described in making moves towards below, thereby makes the described bottom of respectively cutting apart mould import the operation of described locating ring along described snap-latch surface; And
The bottom of described mandrel is inserted through to described locating ring from the top of described locating ring, and the protuberance of periphery of upper end by being based in described mandrel pushes the described upper end of respectively cutting apart mould towards below, thereby the described bottom of respectively cutting apart mould is engaged with described snap-latch surface, and make respectively to cut apart the operation that mould connects airtight mutually.
2. constant velocity universal according to claim 1 is saved the forming method of guard shield, it is characterized in that,
Before the operation of formed body described in injection mo(u)lding, also comprise by the bottom of described mandrel towards below pull, thereby keep the protuberance of described mandrel to be pushed on the operation of described multiple states of cutting apart mould.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012257638A JP6011274B2 (en) | 2012-11-26 | 2012-11-26 | Molding method for constant velocity joint boots |
| JP2012-257638 | 2012-11-26 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103831950A true CN103831950A (en) | 2014-06-04 |
| CN103831950B CN103831950B (en) | 2017-03-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310587448.3A Active CN103831950B (en) | 2012-11-26 | 2013-11-20 | Constant velocity universal saves the forming method of guard shield |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US8926885B2 (en) |
| EP (1) | EP2735422B1 (en) |
| JP (1) | JP6011274B2 (en) |
| CN (1) | CN103831950B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104890198A (en) * | 2015-04-29 | 2015-09-09 | 耿晓冬 | Three-time auxiliary ejection mechanism and mould thereof |
| CN108068268A (en) * | 2016-11-16 | 2018-05-25 | 许容熏 | Constant velocity universal protective cover and its manufacturing method and manufacture device |
| CN108571526A (en) * | 2017-03-08 | 2018-09-25 | 操纵技术Ip控股公司 | energy absorption constant-velocity joint jacket assembly |
| CN109789622A (en) * | 2016-06-30 | 2019-05-21 | 贝尔纳·伦佐 | Pass through the method and related tool of injection moulding manufacture casing and obtained casing |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103182763B (en) * | 2011-12-30 | 2016-03-23 | 袁冰 | A kind of method and apparatus manufacturing silicon rubber cupping apparatus |
| IT201900004057A1 (en) * | 2019-03-20 | 2020-09-20 | Bisio Progetti Spa | MOLD, INJECTION MOLDING METHOD AND RELEVANT CAP WITH EXTERNAL INTERNAL PORTIONS |
| CN111745053B (en) * | 2020-06-30 | 2022-05-17 | 中国航发动力股份有限公司 | Rigid split expansion mold and expansion method for rotary shell |
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| JPH05261776A (en) * | 1992-03-17 | 1993-10-12 | Olympus Optical Co Ltd | Mold for cylindrical material provided with bore undercut |
| CN101351321A (en) * | 2005-12-28 | 2009-01-21 | 丰田自动车株式会社 | Metal mold for shaped article |
| CN102336003A (en) * | 2011-10-28 | 2012-02-01 | 青岛海尔模具有限公司 | Core pulling mechanism of mechanical locking oil cylinder of injection mold |
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| JPS5849228A (en) * | 1981-09-17 | 1983-03-23 | Kyowa Kogyo Kk | Method of handling undercut in mold |
| JPS6425110U (en) * | 1987-08-05 | 1989-02-10 | ||
| JP5201092B2 (en) * | 2009-06-26 | 2013-06-05 | 豊田合成株式会社 | Mold for molding and molding method |
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2012
- 2012-11-26 JP JP2012257638A patent/JP6011274B2/en active Active
-
2013
- 2013-11-18 US US14/082,385 patent/US8926885B2/en active Active
- 2013-11-20 CN CN201310587448.3A patent/CN103831950B/en active Active
- 2013-11-21 EP EP13193788.0A patent/EP2735422B1/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH05261776A (en) * | 1992-03-17 | 1993-10-12 | Olympus Optical Co Ltd | Mold for cylindrical material provided with bore undercut |
| CN101351321A (en) * | 2005-12-28 | 2009-01-21 | 丰田自动车株式会社 | Metal mold for shaped article |
| US20120153540A1 (en) * | 2010-12-16 | 2012-06-21 | Toyoda Gosei Co., Ltd. | Die for molding cvj boot and process for molding the same |
| CN102336003A (en) * | 2011-10-28 | 2012-02-01 | 青岛海尔模具有限公司 | Core pulling mechanism of mechanical locking oil cylinder of injection mold |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104890198A (en) * | 2015-04-29 | 2015-09-09 | 耿晓冬 | Three-time auxiliary ejection mechanism and mould thereof |
| CN109789622A (en) * | 2016-06-30 | 2019-05-21 | 贝尔纳·伦佐 | Pass through the method and related tool of injection moulding manufacture casing and obtained casing |
| CN108068268A (en) * | 2016-11-16 | 2018-05-25 | 许容熏 | Constant velocity universal protective cover and its manufacturing method and manufacture device |
| CN108068268B (en) * | 2016-11-16 | 2020-03-20 | 许容熏 | Boot for constant velocity universal joint, and method and apparatus for manufacturing the boot |
| CN108571526A (en) * | 2017-03-08 | 2018-09-25 | 操纵技术Ip控股公司 | energy absorption constant-velocity joint jacket assembly |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2735422A1 (en) | 2014-05-28 |
| CN103831950B (en) | 2017-03-01 |
| US8926885B2 (en) | 2015-01-06 |
| JP6011274B2 (en) | 2016-10-19 |
| US20140145372A1 (en) | 2014-05-29 |
| JP2014105739A (en) | 2014-06-09 |
| EP2735422B1 (en) | 2015-09-09 |
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